diff --git a/README.md b/README.md
index 3c3c1b3..53d33ba 100644
--- a/README.md
+++ b/README.md
@@ -17,8 +17,10 @@ $ npm run build  # Build the JS dependencies
 
 Ideally, Python dependencies should be installed in a virtual environment.
 
-TODO:
-- `npm run build` should handle prefix
+If you serve the app from a subdirectory (and not the root of your domain),
+you might want to run `API_URL=/subdir/ npm run build` instead of `npm run
+build` to use the correct path to call the API. Note that the trailing slash
+is important.
 
 
 ## Usage
@@ -57,6 +59,9 @@ Additionnally, you can use `make dev` to spawn a development webserver to
 serve the JS frontend and auto-update/auto-reload when you make changes. The
 spawned JS server will be set up at `localhost:8081` and you should start the
 backend Python server at `localhost:8080` with `python -m cuizin` along it.
+You can simply open the app at `localhost:8081` and start developping, it will
+automatically call the API from the `python -m cuizin` process, on port
+`8080`.
 
 
 ## License
diff --git a/config/dev.env.js b/config/dev.env.js
index 1e22973..dd74f6e 100644
--- a/config/dev.env.js
+++ b/config/dev.env.js
@@ -1,7 +1,9 @@
 'use strict'
 const merge = require('webpack-merge')
+const process = require('process');
 const prodEnv = require('./prod.env')
 
 module.exports = merge(prodEnv, {
-  NODE_ENV: '"development"'
+  NODE_ENV: '"development"',
+  API_URL: JSON.stringify(process.env.API_URL || "http://localhost:8080/"),
 })
diff --git a/config/prod.env.js b/config/prod.env.js
index a6f9976..4616fd7 100644
--- a/config/prod.env.js
+++ b/config/prod.env.js
@@ -1,4 +1,7 @@
 'use strict'
+const process = require('process');
+
 module.exports = {
-  NODE_ENV: '"production"'
+  NODE_ENV: '"production"',
+  API_URL: JSON.stringify(process.env.API_URL || null)
 }
diff --git a/cuizin/db.py b/cuizin/db.py
index 573dd7f..1027fd1 100644
--- a/cuizin/db.py
+++ b/cuizin/db.py
@@ -33,16 +33,25 @@ class Recipe(Model):
     """
     Our base model for a recipe.
     """
-    title = CharField()
+    # Name of the recipe
+    title = CharField(null=True)
+    # URL, should be unique
     url = CharField(null=True, unique=True)
+    # Author
     author = CharField(null=True)
+    # Picture as a binary blob
     picture = BlobField(null=True)
+    # Short description
     short_description = TextField(null=True)
+    # Number of persons as text, as it can be either "N persons" or "N parts"
     nb_person = TextField(null=True)
+    # Preparation and cooking times
     preparation_time = IntegerField(null=True)  # In minutes
     cooking_time = IntegerField(null=True)  # In minutes
+    # List of ingredients
     ingredients = JSONField(null=True)
-    instructions = TextField()
+    # Instructions
+    instructions = TextField(null=True)
 
     class Meta:
         database = database
@@ -70,12 +79,13 @@ class Recipe(Model):
         serialized = model_to_dict(self)
         # Dump picture as a base64 string, compatible with HTML `src` attribute
         # for images.
-        picture_mime = (
-          'data:%s;base64' % magic.from_buffer(serialized['picture'],
-                                               mime=True)
-        )
-        serialized['picture'] = '%s,%s' % (
-            picture_mime,
-            base64.b64encode(serialized['picture']).decode('utf-8')
-        )
+        if serialized['picture']:
+            picture_mime = (
+            'data:%s;base64' % magic.from_buffer(serialized['picture'],
+                                                 mime=True)
+            )
+            serialized['picture'] = '%s,%s' % (
+                picture_mime,
+                base64.b64encode(serialized['picture']).decode('utf-8')
+            )
         return serialized
diff --git a/cuizin/js_src/components/Home.vue b/cuizin/js_src/components/Home.vue
index 088c9a1..eab0ac4 100644
--- a/cuizin/js_src/components/Home.vue
+++ b/cuizin/js_src/components/Home.vue
@@ -49,7 +49,7 @@ export default {
     fetchRecipes() {
       this.isLoading = true;
 
-      fetch(`${constants.API_URL}/api/v1/recipes`)
+      fetch(`${constants.API_URL}api/v1/recipes`)
         .then(response => response.json())
         .then((response) => {
           this.recipes = response.recipes;
diff --git a/cuizin/js_src/components/New.vue b/cuizin/js_src/components/New.vue
index b51bc19..d43e8b2 100644
--- a/cuizin/js_src/components/New.vue
+++ b/cuizin/js_src/components/New.vue
@@ -122,7 +122,7 @@ export default {
   methods: {
     submitImport() {
       this.disabledImport = true;
-      fetch(`${constants.API_URL}/api/v1/recipes`, {
+      fetch(`${constants.API_URL}api/v1/recipes`, {
         method: 'POST',
         body: JSON.stringify({
           url: this.url,
diff --git a/cuizin/js_src/components/Recipe.vue b/cuizin/js_src/components/Recipe.vue
index c81f2d6..63b1ebe 100644
--- a/cuizin/js_src/components/Recipe.vue
+++ b/cuizin/js_src/components/Recipe.vue
@@ -54,7 +54,7 @@ export default {
     fetchRecipe() {
       this.isLoading = true;
 
-      fetch(`${constants.API_URL}/api/v1/recipe/${this.$route.params.recipeId}`)
+      fetch(`${constants.API_URL}api/v1/recipe/${this.$route.params.recipeId}`)
         .then(response => response.json())
         .then((response) => {
           this.recipe = response.recipes[0];
@@ -62,7 +62,7 @@ export default {
         });
     },
     handleDelete() {
-      fetch(`${constants.API_URL}/api/v1/recipe/${this.$route.params.recipeId}`, {
+      fetch(`${constants.API_URL}api/v1/recipe/${this.$route.params.recipeId}`, {
         method: 'DELETE',
       })
         .then(() => this.$router.replace('/'));
diff --git a/cuizin/js_src/constants.js b/cuizin/js_src/constants.js
index 4732511..4982031 100644
--- a/cuizin/js_src/constants.js
+++ b/cuizin/js_src/constants.js
@@ -1,2 +1 @@
-export const API_URL = 'http://localhost:8080';  // TODO: Should be coming from an env variable
-export const FOOBAR = 'TODO';  // TODO
+export const API_URL = process.env.API_URL || '/';  // eslint-disable-line import/prefer-default-export,no-use-before-define
diff --git a/cuizin/scraping.py b/cuizin/scraping.py
index 32e6fc1..c3a0c9b 100644
--- a/cuizin/scraping.py
+++ b/cuizin/scraping.py
@@ -47,8 +47,9 @@ def add_recipe(url):
             recipe.url = url
             break
 
+    # If we could not scrape anything, simply create an empty recipe storing
+    # the URL.
     if not recipe:
-        # TODO
         recipe = db.Recipe()
         recipe.url = url